#define _CRT_SECURE_NO_WARNINGS  1
#include <stdio.h>

int main()
{
    char ch;
    while (scanf("%c", &ch) != EOF)
    {
        getchar();
        if ((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z'))
            printf("%c is an alphabet.\n", ch);
        else
            printf("%c is not an alphabet.\n", ch);
    }
    return 0;
}